I have the new GT200 Monos by TRL and have put the KT150 in place of the KT120 tubes. They blow them away. Being that the tubes have such large plates it takes a lot of hours to get them to open up. They are becoming the best tubes I have ever heard. The GT200 monos take complete advantage of the tubes. With the large power supplies and massive caps the tubes really shine. I had a few friends over and the two women actually cried on a piece I played for them. One comment that they made was " I want to stand up and applause". One mistake that some people make is they don't give them time to break in and they don't bias them high enough in order to run a signal through fully.Human voices are a dead give away. Give them time
New KT150 tubes?
Has anyone any experience with these pretty new tubes. There are already one or 2 amps I know of, that use them. The review of one of these amps in a UK magazine suggested they were a little warmer and more natural sounding than the nearly new KT120's
The article also suggested they were a straight swap for KT120 based amps, with no adjustment necessary. They are more than twice the cost of KT120's, but still not too costly compared with NOS tubes. I know changing from KT88's or 90's to 120's. did require some amp modification. I have an ARC reference 75 and might want to try the new tubes at some point, ARC don't seem to have a customer E-mail service, to ask the question
The article also suggested they were a straight swap for KT120 based amps, with no adjustment necessary. They are more than twice the cost of KT120's, but still not too costly compared with NOS tubes. I know changing from KT88's or 90's to 120's. did require some amp modification. I have an ARC reference 75 and might want to try the new tubes at some point, ARC don't seem to have a customer E-mail service, to ask the question